Drier



March 29 1927.

c. OFFENHAUSER DRIER March 29, 1927. 1,622,921

I C. OFFENHAUSER v DRIER Fil q May 25, 1922' 2 Sheets-SheetZ Patented Mar. 29, 1927.

H UNITED STATES CHRISTOPHER OFFENHAUSER, 0F PHILADELPHIA, PENNSYLVANIA.

DRIER.

Application filed May 25,

, One object of my invention is to provide a relatively simple, substantial and practlcal machine for drying, cooking or rendering such materials as the animal waste from packing houses, so that the water and volatile ingredients shall be removed and the dried or cooked residue be lett in a form available for feeding. to cattle, poultry and the like.

Another object of the inventionis to provide a drying or cooking machine of the above type whose construction shall be such as to permit the convenient regulation of the temperature at which it is operated and the drawin oil of certain valuable materials such as tallow, which separate out under operating conditions; the construction being such that the removal of these substances may be accomplished without interfering with the operation of the machine.

further object of the invention is'to provide a machine of the type above noted with novel means for collecting and continuously withdrawing the objectionable gases or vapors which may be generated, so that these may be conducted to a suitable washer or place of discharge.

- These objects and other advantageous ends I attain as hereinafter set forth, reference being had to the accompanying drawings, in which,

Fig. 1 is a longitudinal vertical section of a machine constructed in accordance with my invention;

Fig. 2 is an elevation of one end of the 7 machine shown in Fig. 1;

Fig. 3 is a vertical section on the line 3-3, Fig. 1; I Figs. 4 and 5 are respectively a longitudinal vertical section and an end elevation of a modified form of my invention; and

Fig. 6 is a vertical section on the line 6-6, Fig. 4c;

Fig. 7 is a detailed section of one of the trunnions as seen from the line 7-7 of Fig. 1. j

In Figs. 1 to 3 inclusive of: the above drawings, 1 and 2 represent the end portions of a supporting frame or other suitable structure respectively carrying bearings 3 and 4: for the journals 5 and 6 at the ends of a 1922. Serial No. 563,528.

horizontally extending, more or' less-elongated rotary drum 7 The latter is provided with a steam jacket 8 and its heads 9 and 10 are respectively fixed to flanges connected to or formed as part of said two journals 5 and ('5. This drum is rotated by any suitable means and in the present instance I haveillustrated it as having fixed to one end. a

gear ring 11 driven from a suitable pinion (not shown) on a shaft 12 mounted in bearings on the trame 1 and. recelvlng power from any suitable source through a pulley 13.

For supplying steam to the jacket 8, the journal 6 and its flange carrying the head 10, are provided with any suitable number of passages 14, which extend in the journal in lines substantially parallel to theaxis of the drum and then run radially outward in the flange. At the outer edge of the latter said channels are connected by conduits or other suitable means 15 with the space constituting the steam jacket between thevinner and outer walls ot the drum. The opposite ends of these channels 14L are carried or extend into a fiat plate 16 at the outerend of the journal 6 where they open on opposite sides or and equi-distant from the center 11116 or axis of rotation of said journal.

formed with two passages or ports periodically brought into connection with the passages 14: in the journal as this is rotated, there being a steam supply pipe 18 connected to one of these ports and an exhaust pipe 19 connected to the other. A. suitable stufling box 20 is mounted between the structure 17 and the adjacent part of the rotating head or end plate 16 so as to prevent the escape of steam therebetween.

The parts are so arranged that when the drum 7 occupies the position in which one of its conduits 15 is in the lowest part otits path of movement and therefore in position to receive any liquid which may have condensed in the steam jacket, another one. of said conduits is uppermost and is connected through a passage 14 and the upper one of the ports in the structure 17 with the steam supply pipe 18. The lowermost one ofthe conduits is then in connection with the exhaust or waste pipe 19 so that steam delivcred through the pipe 18 not only heats the steam jacket, but acts on any water which may collect in the bottom of the same to blow it out through the exhaust pipe. Obviously this operation occurs periodically during the rotation of the drum and there may be any desired number of pairs or sets of the pipes and passages 14-.

lVithin the two journals 5 and G are mounted the tubular supporting trunnions 21 and 22 of an inner lined drum 23 coaz ially positioned within the main drum 7 and held immovable in said journals in any sui able manner. agitating or lifting shelves 24 are mounted within the main drum 7 so as to raise or tumble material therein and these carry a suitable number 0" crapers positioned to actnpc nidricel es:- terior surface of the fixed drum 23 as the outer drum is rotated. The latter drum is shorter than the main drum, which at one end is provided with a transverse pertorated partition or screen 26 forming a narnow chamber within which vapor delivery pipe 27 extends radially upward from the trunnion 21. with whose interior its lower end communicates. The upper end of this conduit is open so that water spor or air gases generated by or given oti trom the ma terial being treated can freely pass into it through the partition 26 which obviously prevents the entrance of solid n'iaterial.

The outer end of the trunnion -1 is connected to a delivery pipe 28 leading to a stack or washer and exhaust fan as desired, whereby the vapors or gases given off are etliectually disposed of. The fixed drum 23 is internally heated by steam delivered through a supply pipe 2;) in the trunnion 21, and any water condensed in said drum is withdrawn through an exhaust pipe 30 also extending through said trunnion. The latter in addition carries a suction pipe 31 whose inner end extends from the trunnion radially downward to a point adjacen i the bottom of the main drum 7, while its opposite end is connected to any suitable device for w thdrawing liquids, such as tallow or melted fat, which may be rendered from the material under treatment and pass through the partition 26 into the collecting chamber at the end of the drum.

Suitable manhol s or doors (not shown are provided in the cylindrical wall of the main drum 7 to permit of the introduction and removal of materia and under operating conditions said drum, utter having been charged with packing house waste for example, is rotated at a rate say of two revolutions a minute. At the same time steam is supplied to the pipes 18 and 29 so that both the inner and the main drums are heated it being understood that the pressure of said steam is such and the amount delivered is so regulated, that the material under treatment is cooked or dried at the desired temperature. As the drum 7 is turned, the shelves it raise ant then drop the material, some of which i'alls upon the drum L3 :0 that it is thoroughly agitated and stirred while heat is applied in the best manner to drive oil the water, melt the fat and also cook the solid substances.

Any material tending to stick to the eX- ternal surface of the drum 23 is effectually and continuously removed by the scrapers 25 and any wate' of condensation is forced out or" the inner drum as well out of the steam cket by the means illustrated. Any water vapor or gases given oil by the mate rial in the drum 7 are drawn out through the vapor pipe 27 and from time to time the liquefied tat, etc, collecting in the bottom of the main drum 7 and passing through the partition 26, is witl'idrawn through the pipe 31.

It desired, the inner drum may be made fast to and rotated with the main drum, as indicated in Figs. 4 to 6 inclusive, in which case said inner drum 23, is fastened at one end to one of the heads of the main drum and at the opposite end is supported by the perforated partition 26. In this case the steam for heating the inner drum is obained from the steam jacket 8 through two or more pipes 40, which also serve to conduct any water of condensation from said inner drum into the steam jacket 01' the main drum, from which it is ultimately delivered as previously described, through the pipes 15 and 19.

I claim:

1. The combination in a drier, of a main rotary drum having trunnions; a transverse perforated partition mounted in the drum to torm a relatively small collecting chamber; second stationary drum coaxially positioned within the main drum outside of said chamber: means for introducing; steam into the second drum; and a. pipe extending through one of the trunnions of the main drum for withdrawing liquid collecting in said chamber. 7 i

2. The combination in a drier, of a rotary drum having a steam jacket: a trunnion oh HiCll end of the drum; conduits extending through one oi the trunnions and connected to the steam jacket; a transverse, perforated partition near one end or" the drum Forming a narrow cl'iamber; a heating drum locates in the main portion of the rotary drum; means for supplying steam to the heating drum; lifting shelves on the main drum; scrapers bearing; upon the outer surface ot the heating drum; a conduit for withdrawing liquid collecting in the chamber formed by the perforated partition; and a. vapor delivery pipe communicating with the upper portion of said chamber and extending fixed supply and exhaust conduits positioned through one of the trunnions of the drum. to be periodically connected to said conduits 3. The combination in a drier of a rotary of the trunnion as the drum is rotated; with 10 drum having a steam jacket; trunnions for a stationary drum having supporting por- 5 rotatably supporting said drum; conduits tions extending in the trunnions of said r0- extending through one of the trunnions and tary drum. connected to the steam jacket; relatively CHRISTOPHER OFFENHAUSER. 

